Roll src/third_party/nasm/ f564874f4..21eb59531 (3 commits)

https://chromium.googlesource.com/chromium/deps/nasm.git/+log/f564874f4..21eb59531

$ git log f564874f4..21eb59531 --date=short --no-merges --format='%ad %ae %s'
2019-08-06 rnk@chromium.org Revert "Skip compiling ilog2.c on Windows where 'inline' uses C++ semantics"
2019-08-06 rnk@google.com Fix extern_inline for MSVC and clang-cl
2019-08-01 rnk@google.com Skip compiling ilog2.c on Windows where 'inline' uses C++ semantics

Created with:
  roll-dep src/third_party/nasm

R=dalecurtis@chromium.org, davidben@chromium.org

Bug: 989745
Change-Id: I26c19bce9bb4148154168732f2862cb0c7817686
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1744200Reviewed-by: David Benjamin <davidben@chromium.org>
Commit-Queue: Reid Kleckner <rnk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#685373}

DEPS

@@ -1156,7 +1156,7 @@ deps = {
 
   'src/third_party/nasm': {
       'url': Var('chromium_git') + '/chromium/deps/nasm.git' + '@' +
-      'f564874f49556d930882645a348fcd6ddc6847b0'
+      '21eb595319746a669a742d210eaa413c728e7fad'
   },
 
   'src/third_party/netty-tcnative/src': {